/** @see DATAMONGO-1552 */
@Test
public void shouldExposeDefaultCountField() {
BucketOperation operation = bucket("field");
assertThat(operation.getFields().exposesSingleFieldOnly(), is(true));
assertThat(operation.getFields().getField("count"), is(notNullValue()));
}
/** @see DATAMONGO-1552 */
@Test
public void shouldRenderBucketOutputOperators() {
BucketOperation operation =
Aggregation.bucket("field") //
.andOutputCount()
.as("titles");
DBObject dbObject = operation.toDBObject(Aggregation.DEFAULT_CONTEXT);
assertThat(extractOutput(dbObject), is(JSON.parse("{ titles : { $sum: 1 } }")));
}
/** @see DATAMONGO-1552 */
@Test
public void shouldRenderAddToSetOperator() {
BucketOperation operation =
bucket("field") //
.andOutput("title")
.addToSet()
.as("titles");
DBObject dbObject = operation.toDBObject(Aggregation.DEFAULT_CONTEXT);
assertThat(extractOutput(dbObject), is(JSON.parse("{ titles : { $addToSet: \"$title\" } }")));
}
/** @see DATAMONGO-1552 */
@Test
public void shouldRenderMinOperator() {
BucketOperation operation =
bucket("field") //
.andOutput("score")
.min()
.as("min_score");
DBObject dbObject = operation.toDBObject(Aggregation.DEFAULT_CONTEXT);
assertThat(extractOutput(dbObject), is(JSON.parse("{ min_score : { $min: \"$score\" } }")));
}
/** @see DATAMONGO-1552 */
@Test
public void shouldRenderSumWithValueOperator() {
BucketOperation operation =
bucket("field") //
.andOutput("score")
.sum(4)
.as("cummulated_score");
DBObject dbObject = operation.toDBObject(Aggregation.DEFAULT_CONTEXT);
assertThat(extractOutput(dbObject), is(JSON.parse("{ cummulated_score : { $sum: 4 } }")));
}
/** @see DATAMONGO-1552 */
@Test
public void shouldRenderSumWithOwnOutputExpression() {
BucketOperation operation =
bucket("field") //
.andOutputExpression("netPrice + tax")
.apply("$multiply", 5)
.as("total");
DBObject dbObject = operation.toDBObject(Aggregation.DEFAULT_CONTEXT);
assertThat(
extractOutput(dbObject),
is(JSON.parse("{ total : { $multiply: [ {$add : [\"$netPrice\", \"$tax\"]}, 5] } }")));
}
/** @see DATAMONGO-1552 */
@Test
public void shouldRenderBucketOutputExpressions() {
BucketOperation operation =
Aggregation.bucket("field") //
.andOutputExpression("(netPrice + surCharge) * taxrate * [0]", 2)
.as("grossSalesPrice") //
.andOutput("title")
.push()
.as("titles");
DBObject dbObject = operation.toDBObject(Aggregation.DEFAULT_CONTEXT);
assertThat(
extractOutput(dbObject),
is(
JSON.parse(
"{ \"grossSalesPrice\" : { \"$multiply\" : [ { \"$add\" : [ \"$netPrice\" , \"$surCharge\"]} , \"$taxrate\" , 2]} , \"titles\" : { $push: \"$title\" } }}")));
}